package com.tanhua.sso.service;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.tanhua.sso.config.HuanXinConfig;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @description:
 * @author: Administrator
 * @date: Created in 2021/2/22 21:53
 * @version: 0.0.1
 * @modified By:
 */
@Service
public class HuanXinTokenService {

    private static final ObjectMapper MAPPER=new ObjectMapper();

    private static final String REDIS_KEY="HUANXIN_TOKEN";

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private HuanXinConfig huanXinConfig;

    @Autowired
    private RedisTemplate<String,String>redisTemplate;

    public String getToken(){
        String cacheData = this.redisTemplate.opsForValue().get(REDIS_KEY);
        if(StringUtils.isNotEmpty(cacheData)){
           return cacheData;
        }
        String url=this.huanXinConfig.getUrl()+
                this.huanXinConfig.getOrgName()+
                "/"+this.huanXinConfig.getAppName()+"/token";
        Map<String,Object>param=new HashMap<>();
        param.put("grant_type","client_credentials");
        param.put("client_id",this.huanXinConfig.getClientId());
        param.put("client_secret",this.huanXinConfig.getClientSecret());
        ResponseEntity<String>responseEntity = this.restTemplate.postForEntity(url, param, String.class);
        if(responseEntity.getStatusCodeValue()!=200){
            return null;
        }
        String body = responseEntity.getBody();
        try {
            JsonNode jsonNode = MAPPER.readTree(body);
            String accessToken = jsonNode.get("access_token").asText();
            //过期时间，提前一天失效
            Long expiresIn = jsonNode.get("expires_in").asLong()-86400;
            //将token存储到本地,存储到Redis中
            this.redisTemplate.opsForValue().set(REDIS_KEY,accessToken,expiresIn, TimeUnit.SECONDS);
            return accessToken;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}
